Sphygmomanometer.



P. NICHOLSON.

SPHYGMOMANOMETER.

APPLICATION FILED JUNE 21,1913.

Patented Apr. 14, 1914.

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SPHYGMOMANOMBTBR APPLICATION FILED JUNE 21,1913. 1,093@ 99., Patented Aprr14, 1914.

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. incased relation; Fig. 2 isa front elevation PATENT @Fhllm PERCIVAL NICHOLSON, OF ARDIVEORCE,l PENNSYLVANIA.

Patented Apr. 14,1914..

' Application filed .Tune 21, 1913. Serial No, 775,068.

SPHYGMOMANOMETER.

1,093,199.' Specification of Letters Patent.

To all whom it may concern:

Be it known thatl I, PERcivAL NICHOLSON, a citizen of the United States, residing at Ardmore, in the county of Montgomery and State. of Pennsylvania, have invented certain improvements in Sphygmomanometers, of which the following is a specifica.- tion.

My invention is a sphyginomanometer having improved means whereby there is provided an accurate instrument having separable sections adapted for ready dissociation, compact inclosure within a small case, and ready association for use.

The improvements are characterized by eiiicient means for preventing the escape of the indicating fluid, connecting the jointed parts and adjusting such parts to the desired relation.l

The nature of the improvements is disg closed in the following description and the li' illustration accompanying ldrawings in thereof.

In the drawings, Figurel is a perspective view of a closed case for containing the sphygmomanometer with the parts in vtheir of the ysamewith the lid of the case erected and the parts of the sphygmomanometer thereon; Fig. 3 is a front elevation of the in strument with the parts in their operative i relation; Fig. /l is a broken sectional side elevation of the mechanism; Fig. 5 is a lbroken sectional front view; andrFig. 6 is a i broken elevation of parts of the Sectional tube and its connections. i

The apparatus, as ,illustrated in the dra-wings, comprises the case'l having the lid 2 connected thereto by hinges 3. The lid is held in the closed position by the catch 4, i having the slide 5 movable transversely in the ways 6, and the angular slot 7 in the end ofv the case in which the catch is engaged. i The lid -is`held in the erected position by l the catch 8 fixed thereon and having a lateral projection 8 adapted, when the lid is g elevated, to spring into the notch 9 of a resilient catch 9 iixed within the case.` The i catches 8 and 9 are disengaged; sofvthat the lid can be lowered, by pressing the button i 9 .projecting from the catch 9 through the caseand thereby moving-this catch laterally. A metal tube 10, a glass cistern 11 having the neck 11 connected with the tube, and a 5 glassftubev 12 having its bottom connected with the bottom of the cistern by the U1- bend 18, are lixed to the lid which, when closed, incloses them. The tube 10 has a {iange 10 on its lower end and the neck 11 has a threaded sleeve 14 cemented thereon, the flange and sleeve being connected by a coupling collar 15 engaging the flange in revoluble relation and screwing on the sleeve.

An angular bearing 16, provided with a slot 16', is engaged to the lid by a screw 17 which passes through the slot, whereby the bearing is adjustable laterally. Clips 16a containing slots 16b are fixed in adjustable relation to thebearing 16 'by the screw 16h, the clips having the resilient jaws 16d. A

l lfixture comprising the valve casing 20 and the socket or collar 20 containing the fenestrati'on 20a is held by the clips 16, the jaws 16d engaging the socket 20so that the tixture can be adjusted. The outer end of the tube'12, which contains the tapered socket 12', is lixed in the socket 20, extending beyond the fenestration so as to be wholly surrounded at its extremity by the socket. A clip 18 engages the bend 13, which is movable therethrough, and contains the slot 18 through which the screw 19 passes into the lid, permitting a transverse adjustment of the bend. y

A conicalvalve `21 is journaled in the casing 20 and has therein the diametral passage 21 adapted for registration with the openings 20 and 20 of'the casing, vthe 1 valve having they slot or fenestration 21" i parallel with the aperture 21 and adapted to register with the fenestrations 20zt and 20" i of the fixture. A handle 22 is fixed to the valve and extends in the direction ofthe aperture and slot, the handle extending beyond the end of the lid when the valve is open and lying within the limits of the lid when the valve is closed,'so that the lid cannot beclosed when the valve is open and can be closed when the valve is closed, thereby preventing the escape of the indicating fluid, mercury, by closing the lid with the valve open.

A glass tube 23, having the tapered lowerA end 23, is adapted 'to pass through the casing 2O and valve 21, when the passage 21 is iii registration with thesocket 20 and the aperture '20, into the tapered seat 12 of the tube 12, in the associated relation of the parts. When the instrument is not in use,

i the tub@ 23 is withdrawn from the tube 12,

through the casing and valve 21, and inserted in the tubular holder 24 (having the resilient section 24') xed to the lid 2 by the clip 25, and the valve 21 is turned to close the -tube l2.

The scale section 26 is provided with the bearings 26 containing slots 26", the lid 2 is provided with the bearings 27 which frictionally engage the parts 26', and the screws 27 extend through the parts 27 into the slots 26, the scale being made' adjustable thereby. A scale section 28 is 'connected to the section 26 by the hinge 29 so that the former section can be folded down upon lthe 1 latter, the section 28 being provided with a spring clasp 30 which engages the section 26 to hold the sections in the folded relation when not in use.

The tube 10 has a socket '10a-communicating with the interior of thetube through a valve 31, the socket being adapted to receive a tapered nipple 32 connected, through the tube 33, with the air bulb 34. A second socket 10h of the tube 10 is adapted for receiving a tapered `nipple 35 connected, through the tube 36, with a neumatic culi' 37. A third socket 10c has t erein a needle Avalve 38 by means of which-air is allowed Ito escape from the tube under control.

It will be understood that when not in use the apparatus is protected bythe case, by which it is completely inclosed the nipples 32 and 35 being withdrawn Jfrom the respective sockets 10 and 10", the tube 23 dis` f 28 turned upon its hinge into line with the section 26, t e latteris adjusted to the level of the mercury, and the lower'end of the tube 23 is passed through the casing 2O and l valve 21 into its engagement with the part 12 of the tube 12. Y Y

Have described my invention, I claim:

1. In asphygmomanometer, means comprising a cistern and a tube connected therewith for containing a fluid, means connected therewith for applying pressure thereto and for obliteratin the pulse, a second tube, means comprising a valve through which said second tube is connected with said first tube and by which said'flrst tube is ada ted to be closed, and ascale for reading the eight of the liquid in said tube or tubes.

2. In' a sphygmomanometer, means comprising a tube for containing a liuid, means connected therewith for applying pressure thereto, a second tube, and means comprismg va `socket engaging anend of said first tube, a valve casing,and a valve through which an end of said second tube extends into registration with said rst tube.

3. VIn a s hygmomanometer, means comprising a tu e for containing a fluid, means connected therewith for applying pressure thereto, a second tube, and means comprising a fenestrated socket in which an end of said first tube is disposed, a valve casing through which an .end of said second tube is adapted to extend into registration wlth said first tube, and' a yfenestrated valve 1n said casing through whichV said second tube extends, said second tube passing freely through said valve. Y

4. In a sphygmomanometer, means comprising a tube containing a fluid, means connected )therewith for' applying pressure thereto, a second-tube, and means comprising a fenestrated .socket in which an end of said rst tube is engaged, a valve casing through which an end of said second tube extends into the end of said first tube in said socket, and a fenestrated valve throughwhich said end of said second tube passes freely and 'by which said first tube is adapted to be closed when said second-tubeis withdrawn.

5. In a sphygmomanometer, the combination with a case having a lid, means comprising a valve casing and communicating with the'interior thereof a fenestrated socket xed to said lid, means comprising a glass ,tube having an end xed in said socket, a fenestrated valve with a diametral passage therethrough revoluble in saidcasing to control low through'said tube, a device movable with said valve and engaging said case to prevent the closure of said lid when said -valve is open, and a tube adapted to extend through said casing and the passagein said valve when in the open position into registration'and in lalinement with said tube rst named," said second tube when inserted preventing the operation of said valve.

6. In a sphygmomanometer, the combination with a case having a lid, of means comprising a glass cistern and tube having connected ends; means for communicating pressure to said cistern comprisin a metal tube' fixed to said lid and a coup 'ng having a revoluble sleeve connecting said metal tube with said cistern; av fxturehaving a movable connectionwith said lid, -a fenestrated .socketin which an end of said glass ytube is xed and avalve casing; a fenestrated valve in said casing and having a passage therethrough, and a glass tube extending freely through said valve into said glass tube first named.

7. I'n al sphygmomanometer, the combination with a case having a hinged lid, a xture comprising a. fenestrated socket and a 4valveV casing fixed to said lid, means comprising a glass tube having an end in said socket, a fenestrated valve containing a diametral passage and adapted to turn in said casing, a glass tube adapted for passf ing freely through said casing and valve into registration with said tube first named, and a scale` havin hinged sections for reading a column og liquid in s'aid tubes, a section of said scale being connected in adjustable relation to said lid.

8. In a sphygmomanometer, the combination with a case having a hinged lid, a fix- .ture comprising a socket and a valve casing .fixed to said lid, a glass tube having an end `fixed in said socket, a valve revoluble in said casing and having a handle which prevents the closing ofsaid hd byengaging the case gaging said first catch to hold said lid open, and apush button whereby said second 20 catchis operated to, disengage [it from said first catch.

In' testimony whereof I have 'hereunto set my hand this 20th dayof June, 1913, in the presence of the subscribing Witnesses.

PERCIVAL NICHOLSON.

Witnesses:

Jos. G. DENNY, Jr.,

CHARLES N. BUTLER. 

